Aqua Pura wanted a sweeping, thirst-quenching ode to Cumbria. The brief was for a rippling, rhythmic bit of prose to act as a (river)bed for the epic visuals. There were plenty of ingredients: the hills, the bottle, the clever snap cap, so I poured it all in, gave it a swirl, and this (with a few inevitable client tweaks) is what splashed onto the screen.